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乳酸激活的GPR81/FARP1信号驱动胰岛素独立的葡萄糖吸收和代谢控制
Yaxin Niu1, Shengmin Hu1, Yanfeng Zhang2
1State Key Laboratory of Genetics and Development of Complex Phenotypes, Shanghai Key Laboratory of Metabolic Remodeling and Health, Institute of Metabolism and Integrative Biology, Drug Clinical Trial Center, Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, Fudan University, Shanghai, China.
乳酸L作为葡萄糖吸收的胰岛素独立调节剂,减轻高血糖. 准乳酸受体GPR81为控制高血糖水平提供了一种新的治疗策略.
科学领域:
- 代谢调节 代谢调节 代谢调节
- 碳水化合物的新陈代谢.
- 内分泌学 在内分泌学.
背景情况:
- 胰岛素刺激的葡萄糖吸收对碳水化合物代谢至关重要.
- 调节葡萄糖摄取独立于胰岛素的代谢物在很大程度上是未知的.
- 高血糖症带来了重大的健康挑战,需要新的治疗目标.
研究的目的:
- 为了识别能独立于胰岛素调节葡萄糖吸收的新代谢物.
- 阐明L-乳酸盐影响葡萄糖平衡的机制.
- 探索针对高血糖的L-乳酸盐途径的治疗潜力.
主要方法:
- 使用小鼠模型研究了L-乳酸盐及其受体GPR81在葡萄糖吸收中的作用.
- 利用LDHA和GPR81.1.的基因操纵 (淘汰赛和过度表达).
- 研究了GLUT4转位中涉及FARP1和RAC1的分子机制.
- 与人类代谢参数相关的GPR81表达和变异.
主要成果:
- L-乳酸盐被确定为一种可减轻高血糖的胰岛素独立调节剂.
- 失去LDHA会影响葡萄糖平衡,而服用乳酸盐会改善.
- GPR81淘汰赛恶化了葡萄糖耐受性;它的激活增强了碳水化合物代谢.
- 在GPR81-FARP1-RAC1轴促进GLUT4转位独立于胰岛素信号.
- 运动后LDHA,GPR81和FARP1的表达增加;GPR81变异与禁食胰岛素水平相关.
结论:
- 乳酸L及其受体GPR81在胰岛素独立的葡萄糖调节中起着重要作用.
- GPR81-FARP1-GLUT4通路为控制血糖提供了一个新的机制.
- 准GPR81为管理高血糖症提供了潜在的治疗策略,而不依赖胰岛素信号传递.
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